Furnace Technology
In order to maintain a reducing atmosphere in a furnace, it should have

No O₂ in flue gas
CO in flue gas
None of these
High excess air

ANSWER DOWNLOAD EXAMIANS APP

Furnace Technology
In a furnace employing forced draught as compared to induced draught,

The fan operates hot and hence blades are liable to corrosion and erosion
Positive pressure exists in the furnace
None of these
Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced

ANSWER DOWNLOAD EXAMIANS APP